Project supported by the National Natural Science Foundation of China(Grant Nos.11804088,11234005,11374147,51431006,and 11704109);the National Key Research Program of China(Grant No.2016YFA0300101);the Research Project of Hubei Provincial Department of Education,China(Grant No.B2018146)
The multiferroicity in the RMn_2O_5 family remains unclear, and less attention has been paid to its dependence on high-temperature(high-T) polarized configuration. Moreover, no consensus on the high-T space group symm...